Andrew campbell



(No Model.)

A. CAMPBELL. PRINTBRS INKING AND DISTRIBUTINGROLLER.

NO. 280,447. Patented July 3, 1883.

Fig: 2

v INVENTOR: WITNESSES. "$4 t N. PETERS. MW. W 0. c.

UNITED STATES PATENT OFFICE.

ANDREIV CAMPBELL, OF BROOKLYN, ASSIGNOR TO JOHN MOLOUGHLTN AND EDMUNDMOLOUGHLIN, OF NEV YORK, IT. Y.

PRINTERS INKING AN D DISTRIBUTING ROLLER.

SPECIFICATION forming part of Letters Patent No. 280,447, dated July 3,1888,

Application filed December 14, 1882.

To all whom it may concern:

Be it known that I, ANDREW CAMPBELL, a citizen of the United States,residing in Brooklyn, Kings county, New York, have invented certainImprovements in Printers Inking and Distributing Rollers, of which thefollowing is a specification.

This invention relates to a roller for inking forms, whether 011 stoneor in type, and also for distributing the ink for the form-rollers. Itis intended to take the place of the ordinary leather and compositionrollers used for these purposes.

The ordinary composition-rollers, molded 1 from a compound of glue and asacharine substance, have many objectionable features, arising partlyfrom their susceptibility to changes of temperature and hygrometricchanges, and partly from failure to properly perform their functions,even under the best conditions. N otwithstanding these defects,h0wever,such composition-rollers have, up to this date, served the purposes ofthe printer in general better than any other class of rollers, so far asI am 2 5 aware. The compound leather and rubber rollers proposed forprinters use have also many objectionable features, which I seek toavoid in my herein-described roller, which belongs to this class. Myobject is to provide a light roller with a flexible, uniform, andelastic surface, and free from the various defects inherent in therollers in ordinary use.

For the stock of my roller, I prefer to em ploy a metal cylinder whichmay be solid or 5 hollow. Around this I tightly wrap a sheet of fabric,preferably linen or muslin, covered on one or both sides with softindia-rubber prepared for vulcanization, or some rubber compound ofayielding character. This wrapping is continued until the properthickness is attainedsay one-fourth of an inch, or less. Over this Iapply a uniformly thick layer of soft rubber or rubber compound preparedfor vulcanization to serve as a cushion. Over. 5 this cushion I wrap oneor more thicknesses of some fabric, preferably fine wire-gauze or stronglinen. enough. Over this wrapping I apply another layer of rubber orrubber composition prepared for vulcanization. This layer need not be pthe facing layer of rubber. One thickness will usually be (No model.)

so thick as the cushion-layer, as it is intended for a facing layer. Thecore thus formed is now subjected to the usual process of vulcanization,whereby the rubber is hardened to the proper degree, and all the layersand wrap- 5 5 pings are firmly cemented together. I now true up the coreby dressing or grinding off the surface of the exterior vulcanized layeruntil it is perfectlycylindrical and true on the spindles or bearings ofits stock, and has a perfectly true surface. I now cover the core withsome thing, substance, or composition that will protect the rubber ofthe roller from the action of the oils and solvents found in printersink. 4 For this purpose Imay employ several methods. I may cover theroller with a sheet of tissue-paper saturated with paraffine; or I maycoat it with a varnish that will resist the solvents in the ink; or Imay japan it as metals are japanned. I prefer, however, to first coat itwith such japan as is employed in the manufacture of patent-leather.Then,

before the japan is dry, I wrap the roller with a single layer of finelinen or muslin. Then I apply another coat of japan, and, before itis 75 dry,.slip on the final covering of leather, which forms the exteriorsurface of the finished roll er. The roller thus prepared is thencarefully stoved to bake the japan, and the leather will be found firmlyfixed in place. The japan will effectually protect the rubber from thesolvents in the ink. I may omit the textile or other fabric, and relywholly upon the japan.

In the drawings which serve to illustrate my invention, Figure 1 is alongitudinal mid section of a portion of a roller constructed accordingto my invention, and Fig. 2 is a crosssection of the same; 1

I have not deemed it necessary to show the endsof the roller, as theymay be constructed 0 in the usual or any good way.

A is the cylindrical stock. B is the wrapping of rubber-covered fabric.O is the rubber cushion layer- D is the wrapping of gauze, linen, orother similar material. E is F is the interposed protecting film orcovering, and G is the exterior leather covering.

I prefer to employ for the leather covering G a leather that has beenthoroughly tanned 10o by a slow process, and which is about oneeighth ofan inch in thickness when shaved and finished. The hair or grain side ofthe leather is arranged outwardly to receive the ink, by preference; buteither side maybe an ranged exteriorly. This leather is uniformlyflexible, and is especially suited to my purposes.

The object of the gauze or textile'layer Dis to give the roller thatrigidity which prevents distortion from its true cylindrical formwhenrolling over the type or stone,and prevents the creeping due to theexpanding by pressure of the part of the roller in contact with theform. At the same time it does not impair the elasticity of the roller.

I may in some :ases omit the wrapping I from the stock and apply thecushion of rubher directly to the same; or I may substitute a wrappingof some other kind'as covered wire, for example. The purpose of thiswrapping is to give to the cushion a firmer hold on the stock andprevcntit from tearing loose, as it is liable to do where the cushion isapplied to the stock.

The leather covering of the roller, when applied with japan and baked,forms substantially one with the core of the roller, and this means ofattachment may be employed with rollers having cores constructeddifferently from that herein described.

By rubber compounds, I mean compounds of an elastic or yieldingnature ofwhich rubber forms a part. Many compounds of this nature are well knowninv the arts.

Having thus described my invention, I claim 1. A roller to be employedin printing for applying and distributing ink, comprising a stock, acushion of rubber or its specified equivalent on said stock, a textilecovering over said cushion, a facing layer of rubber or its specifiedequivalent over said textile covering, an interposed lilm orsubstance,substantially as described, to protect the rubber from the solvents inthe ink, and an exterior covering of leather, all constructed andarranged substantially as set forth.

2. A roller for use in printing, having a core with a rubber face, andan exterior covering ofleather, and an interposed layer of japan betweenthe rubber facing and the leather, said japan being baked in the usualway to form a n'otectingshield to prevent the solvents inthcinkfrominjuring the rubber, substantially as set forth.

3. The combination, to form a roller for use in printing, of a core, A,a wrapping, B, a cushion of rubber, (l, a textile covering, 1), a rubberfacing layer, E, an interposed protecting-covering, F, for the facing,constructed and applied substantially as described, and an exteriorcovering of leather, G, all arranged substantially as described.

4. A roller for printers use, comprising a stock, a rubber cushion orcore, a leather cover, and a layer of cement between the rubber and theleather, which will not be affected by the ink, whereby the said rubberis protected against injury from the ink, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

ANDREW CA MPBELL.

\Vitnesses:

1'). E. lhnnnrr, A. It. HIT/Lynn.

